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/**
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* '$RCSfile$'
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* Purpose: A Class that represents a structured query, and can be
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* constructed from an XML serialization conforming to
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* pathquery.dtd. The printSQL() method can be used to print
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* a SQL serialization of the query.
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* Copyright: 2000 Regents of the University of California and the
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* National Center for Ecological Analysis and Synthesis
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* Authors: Matt Jones
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* Release: @release@
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*
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* '$Author$'
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* '$Date$'
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* '$Revision$'
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*/
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package edu.ucsb.nceas.metacat;
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import java.io.*;
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import java.util.Stack;
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import java.util.Vector;
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import java.util.Enumeration;
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import org.xml.sax.Attributes;
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXParseException;
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import org.xml.sax.XMLReader;
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import org.xml.sax.helpers.XMLReaderFactory;
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import org.xml.sax.helpers.DefaultHandler;
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/**
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* A Class that represents a structured query, and can be
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* constructed from an XML serialization conforming to @see pathquery.dtd.
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* The printSQL() method can be used to print a SQL serialization of the query.
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*/
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public class QuerySpecification extends DefaultHandler {
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private boolean containsExtendedSQL=false;
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// Query data structures
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private String meta_file_id;
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private String querytitle;
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private Vector doctypeList;
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private Vector returnFieldList;
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private Vector ownerList;
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private Vector siteList;
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private QueryGroup query = null;
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private Stack elementStack;
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private Stack queryStack;
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private String currentValue;
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private String currentPathexpr;
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private String parserName = null;
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private String accNumberSeparator = null;
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/**
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* construct an instance of the QuerySpecification class
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*
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* @param queryspec the XML representation of the query (should conform
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* to pathquery.dtd) as a Reader
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* @param parserName the fully qualified name of a Java Class implementing
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* the org.xml.sax.XMLReader interface
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*/
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public QuerySpecification( Reader queryspec, String parserName,
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String accNumberSeparator ) throws IOException {
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super();
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// Initialize the class variables
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doctypeList = new Vector();
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elementStack = new Stack();
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queryStack = new Stack();
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returnFieldList = new Vector();
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ownerList = new Vector();
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siteList = new Vector();
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this.parserName = parserName;
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this.accNumberSeparator = accNumberSeparator;
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// Initialize the parser and read the queryspec
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XMLReader parser = initializeParser();
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if (parser == null) {
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System.err.println("SAX parser not instantiated properly.");
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}
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try {
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parser.parse(new InputSource(queryspec));
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} catch (SAXException e) {
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System.err.println("error parsing data");
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System.err.println(e.getMessage());
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}
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}
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/**
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* construct an instance of the QuerySpecification class
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*
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* @param queryspec the XML representation of the query (should conform
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* to pathquery.dtd) as a String
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* @param parserName the fully qualified name of a Java Class implementing
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* the org.xml.sax.Parser interface
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*/
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public QuerySpecification( String queryspec, String parserName,
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String accNumberSeparator) throws IOException {
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this(new StringReader(queryspec), parserName, accNumberSeparator);
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}
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/** Main routine for testing */
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static public void main(String[] args) {
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if (args.length < 1) {
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System.err.println("Wrong number of arguments!!!");
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System.err.println("USAGE: java QuerySpecification <xmlfile>");
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return;
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} else {
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String xmlfile = args[0];
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try {
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MetaCatUtil util = new MetaCatUtil();
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155
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FileReader xml = new FileReader(new File(xmlfile));
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QuerySpecification qspec =
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new QuerySpecification(xml, util.getOption("saxparser"),
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util.getOption("accNumberSeparator"));
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System.out.println(qspec.printSQL());
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} catch (IOException e) {
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System.err.println(e.getMessage());
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}
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}
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}
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/**
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* Returns true if the parsed query contains and extended xml query
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* (i.e. there is at least one <returnfield> in the pathquery document)
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*/
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public boolean containsExtendedSQL()
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{
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if(containsExtendedSQL)
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{
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return true;
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}
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else
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{
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return false;
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}
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}
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/**
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* Accessor method to return a vector of the extended return fields as
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148 |
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* defined in the <returnfield> tag in the pathquery dtd.
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*/
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150 |
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public Vector getReturnFieldList()
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{
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return this.returnFieldList;
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}
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155
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172
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jones
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/**
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* Set up the SAX parser for reading the XML serialized query
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157 |
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*/
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158 |
185
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jones
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private XMLReader initializeParser() {
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159 |
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XMLReader parser = null;
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172
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jones
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155
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// Set up the SAX document handlers for parsing
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162 |
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try {
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163 |
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164 |
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// Get an instance of the parser
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185
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parser = XMLReaderFactory.createXMLReader(parserName);
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155
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185
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// Set the ContentHandler to this instance
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parser.setContentHandler(this);
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155
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185
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// Set the error Handler to this instance
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158
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parser.setErrorHandler(this);
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155
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} catch (Exception e) {
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174 |
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System.err.println(e.toString());
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175 |
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}
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176 |
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177 |
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return parser;
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178 |
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}
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179 |
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180 |
172
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jones
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/**
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181 |
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* callback method used by the SAX Parser when the start tag of an
|
182 |
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* element is detected. Used in this context to parse and store
|
183 |
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* the query information in class variables.
|
184 |
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*/
|
185 |
185
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jones
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public void startElement (String uri, String localName,
|
186 |
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String qName, Attributes atts)
|
187 |
155
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jones
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throws SAXException {
|
188 |
185
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jones
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BasicNode currentNode = new BasicNode(localName);
|
189 |
159
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jones
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// add attributes to BasicNode here
|
190 |
|
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if (atts != null) {
|
191 |
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int len = atts.getLength();
|
192 |
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for (int i = 0; i < len; i++) {
|
193 |
185
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jones
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currentNode.setAttribute(atts.getLocalName(i), atts.getValue(i));
|
194 |
159
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jones
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}
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195 |
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}
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196 |
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197 |
158
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jones
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elementStack.push(currentNode);
|
198 |
159
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jones
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if (currentNode.getTagName().equals("querygroup")) {
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199 |
158
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jones
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QueryGroup currentGroup = new QueryGroup(
|
200 |
178
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jones
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currentNode.getAttribute("operator"));
|
201 |
158
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jones
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if (query == null) {
|
202 |
|
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query = currentGroup;
|
203 |
159
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jones
|
} else {
|
204 |
|
|
QueryGroup parentGroup = (QueryGroup)queryStack.peek();
|
205 |
|
|
parentGroup.addChild(currentGroup);
|
206 |
158
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jones
|
}
|
207 |
159
|
jones
|
queryStack.push(currentGroup);
|
208 |
158
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jones
|
}
|
209 |
155
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jones
|
}
|
210 |
|
|
|
211 |
172
|
jones
|
/**
|
212 |
|
|
* callback method used by the SAX Parser when the end tag of an
|
213 |
|
|
* element is detected. Used in this context to parse and store
|
214 |
|
|
* the query information in class variables.
|
215 |
|
|
*/
|
216 |
185
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jones
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public void endElement (String uri, String localName,
|
217 |
|
|
String qName) throws SAXException {
|
218 |
158
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jones
|
BasicNode leaving = (BasicNode)elementStack.pop();
|
219 |
159
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jones
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if (leaving.getTagName().equals("queryterm")) {
|
220 |
|
|
boolean isCaseSensitive = (new Boolean(
|
221 |
|
|
leaving.getAttribute("casesensitive"))).booleanValue();
|
222 |
|
|
QueryTerm currentTerm = null;
|
223 |
|
|
if (currentPathexpr == null) {
|
224 |
|
|
currentTerm = new QueryTerm(isCaseSensitive,
|
225 |
|
|
leaving.getAttribute("searchmode"),currentValue);
|
226 |
|
|
} else {
|
227 |
|
|
currentTerm = new QueryTerm(isCaseSensitive,
|
228 |
|
|
leaving.getAttribute("searchmode"),currentValue,
|
229 |
|
|
currentPathexpr);
|
230 |
|
|
}
|
231 |
|
|
QueryGroup currentGroup = (QueryGroup)queryStack.peek();
|
232 |
|
|
currentGroup.addChild(currentTerm);
|
233 |
|
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currentValue = null;
|
234 |
|
|
currentPathexpr = null;
|
235 |
|
|
} else if (leaving.getTagName().equals("querygroup")) {
|
236 |
|
|
QueryGroup leavingGroup = (QueryGroup)queryStack.pop();
|
237 |
158
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jones
|
}
|
238 |
155
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jones
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}
|
239 |
158
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jones
|
|
240 |
172
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jones
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/**
|
241 |
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* callback method used by the SAX Parser when the text sequences of an
|
242 |
|
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* xml stream are detected. Used in this context to parse and store
|
243 |
|
|
* the query information in class variables.
|
244 |
|
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*/
|
245 |
158
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jones
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public void characters(char ch[], int start, int length) {
|
246 |
|
|
|
247 |
|
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String inputString = new String(ch, start, length);
|
248 |
|
|
BasicNode currentNode = (BasicNode)elementStack.peek();
|
249 |
|
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String currentTag = currentNode.getTagName();
|
250 |
|
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if (currentTag.equals("meta_file_id")) {
|
251 |
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meta_file_id = inputString;
|
252 |
|
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} else if (currentTag.equals("querytitle")) {
|
253 |
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querytitle = inputString;
|
254 |
159
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jones
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} else if (currentTag.equals("value")) {
|
255 |
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currentValue = inputString;
|
256 |
|
|
} else if (currentTag.equals("pathexpr")) {
|
257 |
|
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currentPathexpr = inputString;
|
258 |
172
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jones
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} else if (currentTag.equals("returndoctype")) {
|
259 |
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doctypeList.add(inputString);
|
260 |
402
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berkley
|
} else if (currentTag.equals("returnfield")) {
|
261 |
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returnFieldList.add(inputString);
|
262 |
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|
containsExtendedSQL = true;
|
263 |
535
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jones
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} else if (currentTag.equals("owner")) {
|
264 |
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ownerList.add(inputString);
|
265 |
|
|
} else if (currentTag.equals("site")) {
|
266 |
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siteList.add(inputString);
|
267 |
158
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jones
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}
|
268 |
|
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}
|
269 |
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|
270 |
172
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jones
|
|
271 |
|
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/**
|
272 |
|
|
* create a SQL serialization of the query that this instance represents
|
273 |
|
|
*/
|
274 |
|
|
public String printSQL() {
|
275 |
170
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jones
|
StringBuffer self = new StringBuffer();
|
276 |
|
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|
277 |
402
|
berkley
|
self.append("SELECT docid,docname,doctype,doctitle,");
|
278 |
626
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berkley
|
self.append("date_created, date_updated, rev ");
|
279 |
172
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jones
|
self.append("FROM xml_documents WHERE docid IN (");
|
280 |
170
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jones
|
|
281 |
178
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jones
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// This determines the documents that meet the query conditions
|
282 |
172
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jones
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self.append(query.printSQL());
|
283 |
|
|
|
284 |
|
|
self.append(") ");
|
285 |
402
|
berkley
|
|
286 |
172
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jones
|
// Add SQL to filter for doctypes requested in the query
|
287 |
535
|
jones
|
// This is an implicit OR for the list of doctypes
|
288 |
172
|
jones
|
if (!doctypeList.isEmpty()) {
|
289 |
|
|
boolean firstdoctype = true;
|
290 |
|
|
self.append(" AND (");
|
291 |
|
|
Enumeration en = doctypeList.elements();
|
292 |
|
|
while (en.hasMoreElements()) {
|
293 |
|
|
String currentDoctype = (String)en.nextElement();
|
294 |
|
|
if (firstdoctype) {
|
295 |
402
|
berkley
|
firstdoctype = false;
|
296 |
|
|
self.append(" doctype = '" + currentDoctype + "'");
|
297 |
172
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jones
|
} else {
|
298 |
|
|
self.append(" OR doctype = '" + currentDoctype + "'");
|
299 |
|
|
}
|
300 |
|
|
}
|
301 |
|
|
self.append(") ");
|
302 |
|
|
}
|
303 |
402
|
berkley
|
|
304 |
535
|
jones
|
// Add SQL to filter for owners requested in the query
|
305 |
|
|
// This is an implicit OR for the list of owners
|
306 |
|
|
if (!ownerList.isEmpty()) {
|
307 |
|
|
boolean first = true;
|
308 |
|
|
self.append(" AND (");
|
309 |
|
|
Enumeration en = ownerList.elements();
|
310 |
|
|
while (en.hasMoreElements()) {
|
311 |
|
|
String current = (String)en.nextElement();
|
312 |
|
|
if (first) {
|
313 |
|
|
first = false;
|
314 |
|
|
self.append(" user_owner = '" + current + "'");
|
315 |
|
|
} else {
|
316 |
|
|
self.append(" OR user_owner = '" + current + "'");
|
317 |
|
|
}
|
318 |
|
|
}
|
319 |
|
|
self.append(") ");
|
320 |
|
|
}
|
321 |
|
|
|
322 |
|
|
// Add SQL to filter for sites requested in the query
|
323 |
|
|
// This is an implicit OR for the list of sites
|
324 |
|
|
if (!siteList.isEmpty()) {
|
325 |
|
|
boolean first = true;
|
326 |
|
|
self.append(" AND (");
|
327 |
|
|
Enumeration en = siteList.elements();
|
328 |
|
|
while (en.hasMoreElements()) {
|
329 |
|
|
String current = (String)en.nextElement();
|
330 |
|
|
if (first) {
|
331 |
|
|
first = false;
|
332 |
|
|
self.append(" SUBSTR(docid, 1, INSTR(docid, '" +
|
333 |
|
|
accNumberSeparator + "')-1) = '" + current + "'");
|
334 |
|
|
} else {
|
335 |
|
|
self.append(" OR SUBSTR(docid, 1, INSTR(docid, '" +
|
336 |
|
|
accNumberSeparator + "')-1) = '" + current + "'");
|
337 |
|
|
}
|
338 |
|
|
}
|
339 |
|
|
self.append(") ");
|
340 |
|
|
}
|
341 |
|
|
|
342 |
170
|
jones
|
return self.toString();
|
343 |
|
|
}
|
344 |
402
|
berkley
|
|
345 |
|
|
/**
|
346 |
|
|
* This method prints sql based upon the <returnfield> tag in the
|
347 |
|
|
* pathquery document. This allows for customization of the
|
348 |
|
|
* returned fields
|
349 |
465
|
berkley
|
* @param doclist the list of document ids to search by
|
350 |
402
|
berkley
|
*/
|
351 |
465
|
berkley
|
public String printExtendedSQL(String doclist)
|
352 |
402
|
berkley
|
{
|
353 |
|
|
StringBuffer self = new StringBuffer();
|
354 |
423
|
berkley
|
self.append("select xml_nodes.docid, xml_index.path, xml_nodes.nodedata ");
|
355 |
|
|
self.append("from xml_index, xml_nodes where xml_index.nodeid=");
|
356 |
|
|
self.append("xml_nodes.parentnodeid and (xml_index.path like '");
|
357 |
402
|
berkley
|
boolean firstfield = true;
|
358 |
|
|
//put the returnfields into the query
|
359 |
|
|
//the for loop allows for multiple fields
|
360 |
|
|
for(int i=0; i<returnFieldList.size(); i++)
|
361 |
|
|
{
|
362 |
|
|
if(firstfield)
|
363 |
|
|
{
|
364 |
|
|
firstfield = false;
|
365 |
405
|
berkley
|
self.append((String)returnFieldList.elementAt(i));
|
366 |
402
|
berkley
|
self.append("' ");
|
367 |
|
|
}
|
368 |
|
|
else
|
369 |
|
|
{
|
370 |
423
|
berkley
|
self.append("or xml_index.path like '");
|
371 |
405
|
berkley
|
self.append((String)returnFieldList.elementAt(i));
|
372 |
402
|
berkley
|
self.append("' ");
|
373 |
|
|
}
|
374 |
|
|
}
|
375 |
423
|
berkley
|
self.append(") AND xml_nodes.docid in (");
|
376 |
465
|
berkley
|
//self.append(query.printSQL());
|
377 |
|
|
self.append(doclist);
|
378 |
402
|
berkley
|
self.append(")");
|
379 |
423
|
berkley
|
self.append(" AND xml_nodes.nodetype = 'TEXT'");
|
380 |
405
|
berkley
|
|
381 |
423
|
berkley
|
//System.out.println(self.toString());
|
382 |
402
|
berkley
|
return self.toString();
|
383 |
|
|
}
|
384 |
465
|
berkley
|
|
385 |
|
|
public static String printRelationSQL(String docid)
|
386 |
|
|
{
|
387 |
|
|
StringBuffer self = new StringBuffer();
|
388 |
489
|
berkley
|
self.append("select subject, relationship, object, subdoctype, ");
|
389 |
|
|
self.append("objdoctype from xml_relation ");
|
390 |
465
|
berkley
|
self.append("where subject like '").append(docid).append("'");
|
391 |
|
|
return self.toString();
|
392 |
|
|
}
|
393 |
453
|
berkley
|
|
394 |
172
|
jones
|
/**
|
395 |
465
|
berkley
|
* Prints sql that returns all relations in the database.
|
396 |
453
|
berkley
|
*/
|
397 |
|
|
public static String printPackageSQL()
|
398 |
|
|
{
|
399 |
|
|
StringBuffer self = new StringBuffer();
|
400 |
|
|
self.append("select z.nodedata, x.nodedata, y.nodedata from ");
|
401 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
402 |
|
|
self.append("'package/relation/subject') s, (select nodeid, parentnodeid ");
|
403 |
|
|
self.append("from xml_index where path like ");
|
404 |
|
|
self.append("'package/relation/relationship') rel, ");
|
405 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
406 |
|
|
self.append("'package/relation/object') o, ");
|
407 |
|
|
self.append("xml_nodes x, xml_nodes y, xml_nodes z ");
|
408 |
|
|
self.append("where s.parentnodeid = rel.parentnodeid ");
|
409 |
|
|
self.append("and rel.parentnodeid = o.parentnodeid ");
|
410 |
|
|
self.append("and x.parentnodeid in rel.nodeid ");
|
411 |
|
|
self.append("and y.parentnodeid in o.nodeid ");
|
412 |
|
|
self.append("and z.parentnodeid in s.nodeid ");
|
413 |
|
|
//self.append("and z.nodedata like '%");
|
414 |
|
|
//self.append(docid);
|
415 |
|
|
//self.append("%'");
|
416 |
|
|
return self.toString();
|
417 |
|
|
}
|
418 |
|
|
|
419 |
|
|
/**
|
420 |
465
|
berkley
|
* Prints sql that returns all relations in the database that were input
|
421 |
|
|
* under a specific docid
|
422 |
|
|
* @param docid the docid to search for.
|
423 |
|
|
*/
|
424 |
|
|
public static String printPackageSQL(String docid)
|
425 |
|
|
{
|
426 |
|
|
StringBuffer self = new StringBuffer();
|
427 |
|
|
self.append("select z.nodedata, x.nodedata, y.nodedata from ");
|
428 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
429 |
|
|
self.append("'package/relation/subject') s, (select nodeid, parentnodeid ");
|
430 |
|
|
self.append("from xml_index where path like ");
|
431 |
|
|
self.append("'package/relation/relationship') rel, ");
|
432 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
433 |
|
|
self.append("'package/relation/object') o, ");
|
434 |
|
|
self.append("xml_nodes x, xml_nodes y, xml_nodes z ");
|
435 |
|
|
self.append("where s.parentnodeid = rel.parentnodeid ");
|
436 |
|
|
self.append("and rel.parentnodeid = o.parentnodeid ");
|
437 |
|
|
self.append("and x.parentnodeid in rel.nodeid ");
|
438 |
|
|
self.append("and y.parentnodeid in o.nodeid ");
|
439 |
|
|
self.append("and z.parentnodeid in s.nodeid ");
|
440 |
|
|
self.append("and z.docid like '").append(docid).append("'");
|
441 |
|
|
|
442 |
|
|
return self.toString();
|
443 |
|
|
}
|
444 |
|
|
|
445 |
|
|
/**
|
446 |
|
|
* Returns all of the relations that has a certain docid in the subject
|
447 |
|
|
* or the object.
|
448 |
|
|
*
|
449 |
|
|
* @param docid the docid to search for
|
450 |
|
|
*/
|
451 |
|
|
public static String printPackageSQL(String subDocidURL, String objDocidURL)
|
452 |
|
|
{
|
453 |
|
|
StringBuffer self = new StringBuffer();
|
454 |
|
|
self.append("select z.nodedata, x.nodedata, y.nodedata from ");
|
455 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
456 |
|
|
self.append("'package/relation/subject') s, (select nodeid, parentnodeid ");
|
457 |
|
|
self.append("from xml_index where path like ");
|
458 |
|
|
self.append("'package/relation/relationship') rel, ");
|
459 |
|
|
self.append("(select nodeid, parentnodeid from xml_index where path like ");
|
460 |
|
|
self.append("'package/relation/object') o, ");
|
461 |
|
|
self.append("xml_nodes x, xml_nodes y, xml_nodes z ");
|
462 |
|
|
self.append("where s.parentnodeid = rel.parentnodeid ");
|
463 |
|
|
self.append("and rel.parentnodeid = o.parentnodeid ");
|
464 |
|
|
self.append("and x.parentnodeid in rel.nodeid ");
|
465 |
|
|
self.append("and y.parentnodeid in o.nodeid ");
|
466 |
|
|
self.append("and z.parentnodeid in s.nodeid ");
|
467 |
|
|
self.append("and (z.nodedata like '");
|
468 |
|
|
self.append(subDocidURL);
|
469 |
|
|
self.append("' or y.nodedata like '");
|
470 |
|
|
self.append(objDocidURL);
|
471 |
|
|
self.append("')");
|
472 |
|
|
return self.toString();
|
473 |
|
|
}
|
474 |
|
|
|
475 |
|
|
public static String printGetDocByDoctypeSQL(String docid)
|
476 |
|
|
{
|
477 |
|
|
StringBuffer self = new StringBuffer();
|
478 |
|
|
|
479 |
|
|
self.append("SELECT docid,docname,doctype,doctitle,");
|
480 |
|
|
self.append("date_created, date_updated ");
|
481 |
|
|
self.append("FROM xml_documents WHERE docid IN (");
|
482 |
|
|
self.append(docid).append(")");
|
483 |
|
|
return self.toString();
|
484 |
|
|
}
|
485 |
|
|
|
486 |
|
|
/**
|
487 |
172
|
jones
|
* create a String description of the query that this instance represents.
|
488 |
|
|
* This should become a way to get the XML serialization of the query.
|
489 |
|
|
*/
|
490 |
159
|
jones
|
public String toString() {
|
491 |
|
|
return "meta_file_id=" + meta_file_id + "\n" +
|
492 |
|
|
"querytitle=" + querytitle + "\n" + query;
|
493 |
|
|
}
|
494 |
|
|
|
495 |
158
|
jones
|
/** a utility class that represents a group of terms in a query */
|
496 |
|
|
private class QueryGroup {
|
497 |
178
|
jones
|
private String operator = null; // indicates how query terms are combined
|
498 |
|
|
private Vector children = null; // the list of query terms and groups
|
499 |
158
|
jones
|
|
500 |
172
|
jones
|
/**
|
501 |
|
|
* construct a new QueryGroup
|
502 |
|
|
*
|
503 |
178
|
jones
|
* @param operator the boolean conector used to connect query terms
|
504 |
172
|
jones
|
* in this query group
|
505 |
|
|
*/
|
506 |
178
|
jones
|
public QueryGroup(String operator) {
|
507 |
|
|
this.operator = operator;
|
508 |
158
|
jones
|
children = new Vector();
|
509 |
|
|
}
|
510 |
|
|
|
511 |
172
|
jones
|
/**
|
512 |
|
|
* Add a child QueryGroup to this QueryGroup
|
513 |
|
|
*
|
514 |
|
|
* @param qgroup the query group to be added to the list of terms
|
515 |
|
|
*/
|
516 |
158
|
jones
|
public void addChild(QueryGroup qgroup) {
|
517 |
|
|
children.add((Object)qgroup);
|
518 |
|
|
}
|
519 |
|
|
|
520 |
172
|
jones
|
/**
|
521 |
|
|
* Add a child QueryTerm to this QueryGroup
|
522 |
|
|
*
|
523 |
|
|
* @param qterm the query term to be added to the list of terms
|
524 |
|
|
*/
|
525 |
158
|
jones
|
public void addChild(QueryTerm qterm) {
|
526 |
|
|
children.add((Object)qterm);
|
527 |
|
|
}
|
528 |
|
|
|
529 |
172
|
jones
|
/**
|
530 |
|
|
* Retrieve an Enumeration of query terms for this QueryGroup
|
531 |
|
|
*/
|
532 |
158
|
jones
|
public Enumeration getChildren() {
|
533 |
|
|
return children.elements();
|
534 |
|
|
}
|
535 |
159
|
jones
|
|
536 |
172
|
jones
|
/**
|
537 |
|
|
* create a SQL serialization of the query that this instance represents
|
538 |
|
|
*/
|
539 |
|
|
public String printSQL() {
|
540 |
170
|
jones
|
StringBuffer self = new StringBuffer();
|
541 |
|
|
boolean first = true;
|
542 |
|
|
|
543 |
|
|
self.append("(");
|
544 |
|
|
|
545 |
|
|
Enumeration en= getChildren();
|
546 |
|
|
while (en.hasMoreElements()) {
|
547 |
|
|
Object qobject = en.nextElement();
|
548 |
|
|
if (first) {
|
549 |
|
|
first = false;
|
550 |
|
|
} else {
|
551 |
178
|
jones
|
self.append(" " + operator + " ");
|
552 |
170
|
jones
|
}
|
553 |
|
|
if (qobject instanceof QueryGroup) {
|
554 |
|
|
QueryGroup qg = (QueryGroup)qobject;
|
555 |
172
|
jones
|
self.append(qg.printSQL());
|
556 |
170
|
jones
|
} else if (qobject instanceof QueryTerm) {
|
557 |
|
|
QueryTerm qt = (QueryTerm)qobject;
|
558 |
172
|
jones
|
self.append(qt.printSQL());
|
559 |
170
|
jones
|
} else {
|
560 |
|
|
System.err.println("qobject wrong type: fatal error");
|
561 |
|
|
}
|
562 |
|
|
}
|
563 |
|
|
self.append(") \n");
|
564 |
|
|
return self.toString();
|
565 |
|
|
}
|
566 |
|
|
|
567 |
172
|
jones
|
/**
|
568 |
|
|
* create a String description of the query that this instance represents.
|
569 |
|
|
* This should become a way to get the XML serialization of the query.
|
570 |
|
|
*/
|
571 |
159
|
jones
|
public String toString() {
|
572 |
|
|
StringBuffer self = new StringBuffer();
|
573 |
|
|
|
574 |
178
|
jones
|
self.append(" (Query group operator=" + operator + "\n");
|
575 |
159
|
jones
|
Enumeration en= getChildren();
|
576 |
|
|
while (en.hasMoreElements()) {
|
577 |
|
|
Object qobject = en.nextElement();
|
578 |
|
|
self.append(qobject);
|
579 |
|
|
}
|
580 |
|
|
self.append(" )\n");
|
581 |
|
|
return self.toString();
|
582 |
|
|
}
|
583 |
158
|
jones
|
}
|
584 |
|
|
|
585 |
|
|
/** a utility class that represents a single term in a query */
|
586 |
|
|
private class QueryTerm {
|
587 |
|
|
private boolean casesensitive = false;
|
588 |
|
|
private String searchmode = null;
|
589 |
|
|
private String value = null;
|
590 |
|
|
private String pathexpr = null;
|
591 |
|
|
|
592 |
172
|
jones
|
/**
|
593 |
|
|
* Construct a new instance of a query term for a free text search
|
594 |
|
|
* (using the value only)
|
595 |
|
|
*
|
596 |
|
|
* @param casesensitive flag indicating whether case is used to match
|
597 |
|
|
* @param searchmode determines what kind of substring match is performed
|
598 |
|
|
* (one of starts-with|ends-with|contains|matches-exactly)
|
599 |
|
|
* @param value the text value to match
|
600 |
|
|
*/
|
601 |
158
|
jones
|
public QueryTerm(boolean casesensitive, String searchmode,
|
602 |
|
|
String value) {
|
603 |
|
|
this.casesensitive = casesensitive;
|
604 |
|
|
this.searchmode = searchmode;
|
605 |
|
|
this.value = value;
|
606 |
|
|
}
|
607 |
|
|
|
608 |
172
|
jones
|
/**
|
609 |
|
|
* Construct a new instance of a query term for a structured search
|
610 |
|
|
* (matching the value only for those nodes in the pathexpr)
|
611 |
|
|
*
|
612 |
|
|
* @param casesensitive flag indicating whether case is used to match
|
613 |
|
|
* @param searchmode determines what kind of substring match is performed
|
614 |
|
|
* (one of starts-with|ends-with|contains|matches-exactly)
|
615 |
|
|
* @param value the text value to match
|
616 |
|
|
* @param pathexpr the hierarchical path to the nodes to be searched
|
617 |
|
|
*/
|
618 |
158
|
jones
|
public QueryTerm(boolean casesensitive, String searchmode,
|
619 |
|
|
String value, String pathexpr) {
|
620 |
|
|
this(casesensitive, searchmode, value);
|
621 |
|
|
this.pathexpr = pathexpr;
|
622 |
|
|
}
|
623 |
|
|
|
624 |
172
|
jones
|
/** determine if the QueryTerm is case sensitive */
|
625 |
158
|
jones
|
public boolean isCaseSensitive() {
|
626 |
|
|
return casesensitive;
|
627 |
|
|
}
|
628 |
|
|
|
629 |
172
|
jones
|
/** get the searchmode parameter */
|
630 |
158
|
jones
|
public String getSearchMode() {
|
631 |
|
|
return searchmode;
|
632 |
|
|
}
|
633 |
|
|
|
634 |
172
|
jones
|
/** get the Value parameter */
|
635 |
158
|
jones
|
public String getValue() {
|
636 |
|
|
return value;
|
637 |
|
|
}
|
638 |
|
|
|
639 |
172
|
jones
|
/** get the path expression parameter */
|
640 |
158
|
jones
|
public String getPathExpression() {
|
641 |
|
|
return pathexpr;
|
642 |
|
|
}
|
643 |
159
|
jones
|
|
644 |
172
|
jones
|
/**
|
645 |
|
|
* create a SQL serialization of the query that this instance represents
|
646 |
|
|
*/
|
647 |
|
|
public String printSQL() {
|
648 |
170
|
jones
|
StringBuffer self = new StringBuffer();
|
649 |
|
|
|
650 |
|
|
// Uppercase the search string if case match is not important
|
651 |
|
|
String casevalue = null;
|
652 |
|
|
String nodedataterm = null;
|
653 |
|
|
|
654 |
|
|
if (casesensitive) {
|
655 |
|
|
nodedataterm = "nodedata";
|
656 |
|
|
casevalue = value;
|
657 |
|
|
} else {
|
658 |
|
|
nodedataterm = "UPPER(nodedata)";
|
659 |
|
|
casevalue = value.toUpperCase();
|
660 |
|
|
}
|
661 |
|
|
|
662 |
|
|
// Add appropriate wildcards to search string
|
663 |
|
|
String searchvalue = null;
|
664 |
|
|
if (searchmode.equals("starts-with")) {
|
665 |
|
|
searchvalue = casevalue + "%";
|
666 |
|
|
} else if (searchmode.equals("ends-with")) {
|
667 |
|
|
searchvalue = "%" + casevalue;
|
668 |
|
|
} else if (searchmode.equals("contains")) {
|
669 |
|
|
searchvalue = "%" + casevalue + "%";
|
670 |
|
|
} else {
|
671 |
|
|
searchvalue = casevalue;
|
672 |
|
|
}
|
673 |
|
|
|
674 |
178
|
jones
|
self.append("SELECT DISTINCT docid FROM xml_nodes WHERE \n");
|
675 |
170
|
jones
|
|
676 |
|
|
if (pathexpr != null) {
|
677 |
|
|
self.append(nodedataterm + " LIKE " + "'" + searchvalue + "' ");
|
678 |
|
|
self.append("AND parentnodeid IN ");
|
679 |
|
|
self.append("(SELECT nodeid FROM xml_index WHERE path LIKE " +
|
680 |
|
|
"'" + pathexpr + "') " );
|
681 |
|
|
} else {
|
682 |
|
|
self.append(nodedataterm + " LIKE " + "'" + searchvalue + "' ");
|
683 |
|
|
}
|
684 |
|
|
|
685 |
|
|
return self.toString();
|
686 |
|
|
}
|
687 |
|
|
|
688 |
172
|
jones
|
/**
|
689 |
|
|
* create a String description of the query that this instance represents.
|
690 |
|
|
* This should become a way to get the XML serialization of the query.
|
691 |
|
|
*/
|
692 |
159
|
jones
|
public String toString() {
|
693 |
|
|
|
694 |
535
|
jones
|
return this.printSQL();
|
695 |
159
|
jones
|
}
|
696 |
158
|
jones
|
}
|
697 |
155
|
jones
|
}
|